Shuttle for automatic looms



April 13 1926.

1,580,961 G. M. CHENEY SHUTTLE FR AUTOMATIC LOOMS Filed August 13.. 1923 Patented Apr., i3, 1926.

Unirse STATES suenen M. CHENEY, or soUTHBRI'Den, MASSACHUSETTS, Assrenon TOVILITCHFEELD SHUTTLE COMPANY, OF SOUTHBRDGE, MASSACHUSETTS, A COR?ORATION F MASSACHUSETTS.

SHUTTLE FOR ATOMATIC LOOIVIS.

Application filed August 13, 1923. Serial N0.G57,139.

.To il? 107mm it may concern Be it known that I, Gnocca M. Giannini', a citizen of the United States, and resident of Southbridge, in the county of Worcester and State of liflassachuetts, have invented certain new and useful Improvements in Shuttlesfor Automatic Looms, of which the following is a specification.

This invention relates to shuttles and especially to that type of shuttles used in automatic looms which are provided at the rear or heel end with a deliector plate or member for Guiding the bob'bin into the spring forli which grips and holds the bobbin axially in the shuttle for the weaving operation.

As the successive bobbins fed into the shuttle are driven from the bobbin magazine into the shuttle by a forcible blow or impact from the hammer, the forwardly anddownwardly inclined defiector is subjected to repeated sharp blows or shocks which produce strains and vibrations tending to cause the defiector and its fastening'k or anchoring screw, as well as other parts, to work loose and thus interfere with the operation of accurately feeding the bobbin into the shuttle. v

The present invention is intended toevercoine the above described trouble and other diiiiculties besides by providing an anchor ing and supporting means for the forli and for the deflector that minimizes these faults. The inventionconsists in applying to the deflectorsecuring means which maintain a continualV tension capable` of yielding slightly to absorb the shocks while maintaining a constant contact between the securing means and the defiector. Thesame principle is also applied to anchoring the spring fork securely in proper position.

These and other features of the invention will he explained in the following specification and will be defined in the claims hereto annexed. a

in the accompanying drawings Iliave illustrated the preferred construction and arrangement embodying the principles of this invention, in which Figure l is a plan view of the rear or heel end of the shuttle properly machined to receive the bobbin forli deficctor and other parts with the vertical anchoring boltsh'own in horizontal section directly below its head.

Figure 2 is a plan view of the rear portion of the shuttle showing the spring fork bobbin deiiector and the anchoringmembers in their normal operative position.

Figure 3 is a central vertical section through the parts shown in Figure 2.

,Figure i a horizontal section on the plane of the transverse Vanchoring bolt.

.Figure 5 is a vertical cross section showing the base of the bobbin secured inits holding forli. i

Figure 6 is a enforcing plate.

Figures Y and S are perspective views of the self-locking nut and washer used on the anchoring bolts. y

Figure 9 is a perspective of the tension device or spring washer.

Figure l0 is a detail view showing in plan, partly broken away,.the bobbin delector plate.

plan View of the deflector re- Figures il and l2 show a modilied form of reinforcing plate. ln the practice of this invention, according to the construction and 'arrangement il? lustrated in the drawings, the heel orrear v end of the shuttle l, is `provided with a shallow IJ-shaped recess fformed in theVtop of the shuttle for'the reception ofthe upper leg or arm of the defleetor plate, and its forward interior portion is cut away to a substantially `greaterdepth to form a small and tapered recess 3, for the reception of the rear end portion of t-he bobbin-liolding fork. The floor or bottoni of the recess 3 is dextended forwardlyto the front edge of the heel end of .the shuttle to form a supporting shelf or ledge which supports the downl ward thrust of the spring fork 5.

` rihc spring fork 3, is ofa usual construction coniprising an integral strip of heavy spring metal doubled bachy upon itself at thc middle portion'to forni `a relatively narrow slotted shank 5 whose forward ends diverge andextend forwardly to form the spring` arms for gripping the rings l5, formed onl the base of the bobbin 16. At their oiiter end portions the spring arms of the forli are vertically corrugated `to form recesses 5 to'V register with the retaining rings ontlic bobbinf To protect the thrustsupportingwall il,

as well as to deflect or guide the'entering bobbin so that its ring will be in proper alignment with Vthe receiving slots 5b, the; detle'ctor member 6 is employed. This coinprises an upper arm (3 and a lower arni Gl?, with an intermediate inclined or sloping portion 6C, which acts as the dellector for guiding' the bobbin. against buckling under the repeated blows et the bobbins striking against it at the iniddlc portion o' the inclined `or sloping guide face c, l provide a special reen'iorcin'g inemk ber 7, terminating at its iront in a straight edge projecting across the space between the separated arms oi the tori; in line with the crease or bend at the juncture of the top portion 6a, and the inclined portion 6c ot the detlector plate.

To give additional tirinness and solidity to the fork there is usually employed a wedge ineinber or plug 8 whichv is forced intoy the narrow recess in the shank portion of the bobbin lforlc ln this case the wedge is made somewhat deeper vertically than the depth o'r` the shank portion of the fork, and is rabbeted or cutaway at its 'front edge so as to leave a projecting` guide portion 8, formed to lit into the slot inthe rear or tail member 7b, of the bridge plate rlChe iniddle portion ot' the transverse bridge 7 rests on the shoulder `formed by cutting away the lorward part of the wedge so that a firm support is given to the entire forwardly pro 'jecting or overlianging portion ot the upper.

arin of the delect'or to prevent it from bucaL ling or bending. As the top surface oit the key member 8a, and the bridge plate 7, are flush with each other they forni a continuous level supporting surface lor the under side of the Vupper arm 6a, of the dek tiector. The lower arm 6b, tornis level surface for supporting the flushv bottoni faces oi the fork and ot the wedge and pref vents them iroinindeiiting the wooden wall or floor beneath. i

As shown in Figures l, 2, 3 and 5, the side walls ot the shuttle toward'the Vrear Vpart that ei'i'ibrace the divergent arins oil the fork 5, are undercut to ioimy narrow overhangiugledges la, which ledges7 "as shown in Figures 2 and 3, torni a positive stop or anchorage'against any tilting upward bt the l'orward ends ot the b'obbin fork rsince the fork, at itsV widest point, passes under these ledges and any such upward thrust would be transmitted through the side edges of the bridge plate against the bottoni ot said. ledges or shoulders. Since the bottoni floor il ot this portion ot the shuttle pi vents any downward tilting,

in the 'forward end o'l the 'foi-lr, the toi-lr is securely anchored against any possible pivotal movement about its transverse retaining bolt 12. 1

lt will also be seei'rthat the forcible thrustot therbobbin against the inclined portion 6C of the deiriector plate'Gis transmitted through the bridge plate 7 tothe underlying portion ot" the wedge blocl; Q, p`ro- To support the detlector.'

` ot the shuttle.

vided with radial grooves or i'ecesee and vibrations imparted by the'blows of the loom picker-stick against the ends ot the shuttle, but also because of the heavy impact ot the butt or base of ythe bobbin as it is forcibly driven into the shuttle to replace an empty bobbin, and much loss and inconvenience has been caused by the loosening of the assembled parts.

According to my present invention the parts are securely anchored by vertical and transverse anchoring elements which are constantly kept under heavy spring tension, while'the fasteningeleinents are also helder secured in rotative nioveinentby their own H'XQS- c As shown in Figures 2 and 3, they upper arm ofl the bobbin-detlecting and fork-retaining plate is extended rearwardly and is provided with a countersunk perforation as shown at 6, the perforation being inade of an irregular form, in this case a keyhole slot, to prevent rotation of the bolt passed through it. ,The vertical anchoring bolt 9 has its underside inwardly bevelled and at one point yis provided with a web or lin 9a, to engage the eccentricl notch formed in the perforation 6. To leep therbolt constantly under tensionl einploya split washer 10, with its adjacent endsaxially o'liset and with at least one tace preferably provided with corrugations 10a', which yare indented into the wood and assist in preventing rotation of the bolt 9. y

Thecorrugated spring washer is placed around the .upper `edge o'f-the vertical bolt hole in the shuttle body with the opening between its ends aligned with the eccentric notch formed in the plate perforation G. Thewasher is placed in position before the dellector and 'fork are assembled inoperative position sous to` lie beneath the plate and ergert ast-long upward v.tension thereon, the

corrugated kside being turned downward to engage theunderlying portion of thewood The vbolt is then inserted with its threaded end projecting into the bottoni slot of a countersuiilr recess and an automatically locked nut 13 with its lockingr washer 1l, are place-d over the thread end and tightened yuntil the corrugations 1lzx of the washer are vembedded in the exposed surtace ot the wood sui-rounding the bolt hole. rlhe opposite tace ot the washer 'llV is proll, which receive andinterloclr with corresponding ribs 13e toi-ined on the opposed tace ot the'nut, Y V

Freni the foregoing it will be seen, first that the dellectorplate rests on the cointransverse locking bolt l2 may bedispensedV pressed spring at its rear anchored end and sustains the downward strain or thrust of the anchoring bolt, while the anchoriiiig bolt is positively held against rotation by means of its interlocking engagement with the recess in the deflector plate and is itself kept under constant tension by the compressed spring washer. At the other end of the bolt, the self-locking nut, engaging its.

corrugated interlocking washer, is held` against rotation since the rejecting ribs on the washer are embedded in the wood under a strong tension. The result is a slight cushioning of each shock or impact and constant locking tension which i 'prevents any working loose of the parts. j Y

A transverse fastening element is made on exactly the same principle and comprises a bolt l2, having underneath lits head a locking fin 12a resting against a spring washer l0, exactly like that already described, while at its other end an interlocking mit 13 ant washer 1l, precisely like that already described, is employed to prevent rotation under the influence of rapid vibration.

Therefore, the combination of the continuous spring tension with the self-locking elements of the fastening means act to Overcome the troublesome tendency of the parts to work loose so long as the shuttle'it-self remains in good serviceable condition. Atl the same time the parts can be disassembled by means of a socket wrench applied to the locking nuts with sufficient force to turn them against their locking or holding means,

since the spring will yield suiiiciently to allow such disengagement while maintaining a positive lock as against any mere accidental rotation due to vibration or shock.

In Figures ll'and 12 are shown a slightly modified form of bridge plate in which the body portion 17, of the bridge plate,`is not slotted or perforated to receive the projecting .tins shown in 8, but simply lies flat over the top face of the wedgeblock 8 which is flush with the top surface of the bobbin fork. The body portion 17 of this bridge plate has lateral forwardly projecting eXtensions or arms 17a, which Vpass beneath the ledges ln at the top of the shuttle and engage tlie undercut side walls. In this case both the widest portion of the fork and the widest portion ofthe bridge plate are sustained by the side walls against any lateral displacement or torsional displacement in a horizontal plane, while these two members, being snugly interposed between the licor or bottom 4 of the shuttle body and the voverhanging ledges or shoulders l, are positively anchored against any vertical displacement or turning. lilith this construction the with entirely if desired since the vertical bolt 9 serves to prevent any longitudinal displacement and any other possible displacement is taken care of by the supporting pori tionof the shuttle body itself. lVith this in view the wedge. block 18 is shown without any perforation an-d Without any upwardly projecting rib, similar to 8, to penetrate a slot in the bridge plate.

lVhat I claim is:

l. In a loom shuttle, the combination of bobbin fork, a cooperating'fork-supporting and bobbin-deflecting member having an upper arm extending rearwardly beyond the fork and provided with a bolt-receiving and 'locking perforation, an anchoring bolt passed through said perforation andthe underlying' portion of the shuttle body, a selflockcd nut secured to the other end of the bolt, and a compressive spring located bcneath tlie said perforated extension of the l terlocked bolt passed through said perforation and the shuttle body, and a lock nut secured to the lower end of said bolt and acting through the bolt to compressv said rearward extension upon said spring,vsub stantially. as describe 3. In a loom shuttle,the combination ofa fork-embracing lbobbin-defiecting plate provided with a perforated rearward eXtensionY overlying the solid heel portion of the shuttle body, and fastening means passed throughsaid perforated extension andthe underlying portion of the shuttle body and acting to draw said rearward extension firmly against a yielding supporting mein-` ber, substantially as described.

ico

4. In a loom shuttle, the combination of a fort-embracing bobbin-deflecting member andl fastening means embracing a bolt pro-' vided with a torsion-resisting portion arranged to interlock with a Vbolt hole in'said member to prevent its rotation in the shuttle body, bolt-tensioning means forming an intermediate connection between the torsionpreventing member and the shuttle body, and a self-locking nut secured in the opposite end and maintained in locked relation vto, the shuttle by said tensioning means, substantially as described.

5. In a loom shuttle, the kcombination of a bobbin fork, a fork-embracing deliectorand fastening members passing vertically and `laterally through the shuttle "body each vmember being provided with torsion-preventing means and tensioning devices forinng a locking connection between the body of the shuttle and said fastening` members, one ort said tensioning devices also being arranged to exert a yielding pressure against a rearward extension ot tlie'detleetor, substantially as described.

(3. ln a looni shuttle, the combination with a bobbin forli and a detleetor comprising upper and lower tork-einbtaeing arms and an intern'iediate forwardly inclined 'detlector portion, a brdgenieinber interposed between the upper tace ot the forli and the upper arm ot the deiiector and comprising a nar- 'at its forward end,

scribed.

-Wide forward )ortion wliose front edo'e e3;-

tends across both arrns ot' the forli and beneath overlianging ledges of the shuttle bodyv to torni are-enforcing bridge to support the entire Width of tlie deleetor and positively anclior'tlie fork against upward movement substantialllyY as de- In Witness whereof, havesubseribed the above specification.

GEORGE M. CHENEY. 

